21568495

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 29937600

約数和(自身を除く): 8369105

約数列:

[1, 5, 13, 17, 65, 85, 131, 149, 221, 655, 745, 1105, 1703, 1937, 2227, 2533, 8515, 9685, 11135, 12665, 19519, 28951, 32929, 97595, 144755, 164645, 253747, 331823, 1268735, 1659115, 4313699, 21568495]

約数ペア:

[(1, 21568495), (5, 4313699), (13, 1659115), (17, 1268735), (65, 331823), (85, 253747), (131, 164645), (149, 144755), (221, 97595), (655, 32929), (745, 28951), (1105, 19519), (1703, 12665), (1937, 11135), (2227, 9685), (2533, 8515)]